Sheet material



FIG. 1 is a top plan view of the repeat unit of the sheet materialshowing my new design;

FIG. 2 is a top plan view of a sheet material including the repeat unitshown in FIG. 1; and,

FIG. 3 is a top plan view of the repeat unit of the sheet materialshowing a second embodiment of my new design.

The side of the sheet material opposite that depicted in FIGS. 1-3 formsno part of the design.

The ornamental design for the sheet material, as shown and described.